Bamboo charcoal produces negative ions: negative ions have a strong dust collection effect, reducing the stimulation of the respiratory tract by floating dust and other objects. At the same time, it can promote the movement of the villi on the respiratory tract, and prevent the human body from being polluted, stimulated and injured by foreign objects; it can increase lung capacity and smooth muscles The degree of tension can improve the normalization of mucus secretion in the respiratory tract, reduce irritation, and improve the ventilation function of the lung; after being absorbed by the body, negative ions can regulate the excitement of the nerve center, stimulate the expansion of peripheral blood vessels, relieve arterial vasospasm, and lower blood pressure It has a certain effect on the recovery of high blood pressure and cardiovascular and cerebrovascular diseases; in addition, negative ions can calm the nerves, relieve fatigue, promote sleep, increase appetite, promote blood circulation, help gastrointestinal contraction, facilitate digestion, and reduce aging.